Previously in the 20th century, the ISI's work and activities have included the support of the Afghan mujahideen in then-communist Afghanistan against the Soviet Union in their war against the mujahideen and later provided strategic and intelligence support to the Taliban against the Indo-Iranian backing the Northern Alliance in the civil war in Afghanistan in 1990s.
From its inception, the agency has been headed by an appointed three-star general officer in the Pakistan Army, despite officers from all three branches of the Pakistan Armed Forces being served and hired by the ISI.
The Chief of Army Staff recommends the names of the Director General, but official confirmation and appointment is needed from the Prime minister.
The ISI is headquartered in Islamabad, Islamabad Capital Venue, and is currently headed by Lieutenant-General Zaheerul Islam who replaced Ahmed Shuja Pasha in March 2012.